66799490 has 8 divisors (see below), whose sum is σ = 120239100. Its totient is φ = 26719792.

The previous prime is 66799487. The next prime is 66799493. The reversal of 66799490 is 9499766.

It is an interprime number because it is at equal distance from previous prime (66799487) and next prime (66799493).

It can be written as a sum of positive squares in 2 ways, for example, as 61795321 + 5004169 = 7861^2 + 2237^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66799493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3339965 + ... + 3339984.

Almost surely, 2^66799490 is an apocalyptic number.

66799490 is a deficient number, since it is larger than the sum of its proper divisors (53439610).

66799490 is a wasteful number, since it uses less digits than its factorization.

66799490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6679956.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 66799490 is about 8173.0954968115. The cubic root of 66799490 is about 405.7492405129.

The spelling of 66799490 in words is "sixty-six million, seven hundred ninety-nine thousand, four hundred ninety".